While there’s talk that investment dollars for security startups are getting harder to find, entrepreneurs still manage to deliver a range of hardware, software and services that protect data, networks and corporate reputations.

This roundup of 13 such companies that we’re keeping an eye on runs the gamut from cloud security services to fraud prevention to protecting supervisory control and data acquisition (SCADA) and Internet of Things devices.

These vendors clearly see the value of assessing the strength of network security architectures. Among them are four startups that simulate attacks against networks in order to test how well their defenses work and to help security staffers get the hang of what it’s like to get hit by a range of exploits and to hone their responses. AttackIQ, Cybric, SafeBreach and Verodin all have variations on this theme but all try to probe networks for vulnerabilities that could be strung together to create successful intrusions.